I just purchased a used chromebook for $50. I thought it was a steal. So far I love the platform and it works great for me and what I need. My problem is that even after a powerwash and nothing being downloaded onto the system my file manager only shows just over 500 MB free of the 16 GB ssd that comes on the laptop. I can't find where anything is that could be taking up the space. It was just powerwashed. Any suggestions. I am very new to the chromebook platform so I don't know much.